Quaker Oats Meatloaf

1-1/2 pounds ground beef 90% lean

1/4 cup finely chopped onion

1 egg

1 cup tomato juice or V8

3/4 cup Quaker oats

1/4 tsp Black pepper

1/2 tsp Salt

350 for one hour or until internal temp is 160

Topping(Optional)

1/2 cup catsup

1/8 cup brown sugar

1 Tbsp apple cider vinegar